cli: incorrect property to python built-in symbol encapsulation (#1015975)

If a object has a property with the same
name as an internal property. We do not
append '_' to the property name.

Change-Id: Ie6efa65f785b33ccd46fc23bf4e223fa8e76dfad
Bug-Url: https://bugzilla.redhat.com/1015975
Signed-off-by: Ravi Nori <rnori@redhat.com>